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    <title>Async Copy and Prefetch Functions</title>
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    <div class="refentry">
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        <h1>Async Copy and Prefetch Functions</h1>
        <p>Asynchronous copies between global and local memory and a prefetch from global memory.</p>
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      <div class="refsect1">
        <a id="springboard"></a>
        <h2></h2>
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                <td align="left">
                  <a class="citerefentry" href="async_work_group_copy.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">async_work_group_copy</span>
                    </span>
                  </a>
                </td>
                <td align="left">Perform an async copy</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="wait_group_events.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">wait_group_events</span>
                    </span>
                  </a>
                </td>
                <td align="left">Wait for events that identify the <code class="function">async_work_group_copy</code> operations to complete.</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="prefetch.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">prefetch</span>
                    </span>
                  </a>
                </td>
                <td align="left">Prefetch bytes into the global cache.</td>
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      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
			The OpenCL C programming language implements these functions that provide asynchronous copies between global and local memory and a prefetch from global memory. The generic type name <span class="type">gentype</span> indicates the built-in data types <span class="type">char</span>,  <span class="type">char{2|4|8|16}</span>, <span class="type">uchar</span>, <span class="type">uchar{2|4|8|16}</span>, <span class="type">short</span>, <span class="type">short{2|4|8|16}</span>, <span class="type">ushort</span>, <span class="type">ushort{2|4|8|16}</span>, <span class="type">int</span>, <span class="type">int{2|4|8|16}</span>, <span class="type">uint</span>, <span class="type">uint{2|4|8|16}</span>, <span class="type">long</span>, <span class="type">long{2|4|8|16}</span>, <span class="type">ulong</span>, <span class="type">ulong{2|4|8|16}</span> or <span class="type">float</span>, <span class="type">float{2|4|8|16}</span> as the type for the arguments unless otherwise stated.
        </p>
        <p> 
		The built-in async copy and prefetch functions are extended with <a class="citerefentry" href="cl_khr_fp64.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp64</span></span></a> to include appropriate versions of functions that take <span class="type">double</span>, and <span class="type">double{2|4|8|16}</span> as arguments. They are also extended with with <a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a> to include appropriate versions of functions that take <span class="type">half</span>, and <span class="type">half{2|4|8|16}</span> as arguments. 
		</p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />
                                                 
            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.0.pdf#page=201" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2009 The Khronos Group Inc. 
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials. 
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